Slic3r 1.0.0RC1 is out!!! New of the year 2013
http://slic3r.org/
@Tim_Rastall and @Sanjay_Mortimer , multiple extruder support!
Quite excited about this release 
Can’t wait to get home and try this out!
3D preview? Awesome! Slic3r was lagging behind on that point.
Fantastic news 